Grafting lets you clone a proven tree onto a new root — or convert an existing tree/seedling to a known variety. Blue Hill sells rootstock for exactly this. Here’s how Ryan does it.
The core concept: cambium to cambium
Every bud on a piece of scion wood can become a tree genetically identical to the original. Grafting works when the cambium (the thin green living layer just under the bark) of the scion touches the cambium of the rootstock. Ryan’s analogy: like swapping fingers between two people of the same blood type — matched living tissue heals fast and grows. Graft within a species: apple→apple, pear→pear, persimmon→persimmon.
Timing by species
- Apples: graft as the tree starts leafing/growing out in spring.
- Pears: graft as soon as the tree starts pushing buds in spring (pears are easy — T-buds and bark grafts take readily).
- Persimmons: a longer window — roughly late spring into late June, but not later than about July 1 in central PA, because the graft must fully grow and harden off by first freeze.
Bark graft (great for persimmons and topworking)
- On the stock, remove excess growth but leave a couple of small “nurse” branches — you don’t want all the tree’s energy rushing to the fresh graft at once (remove nurse branches later).
- Make your cut where the bark slips (you’ll see the green cambium layer).
- Insert the prepared scion so cambium meets cambium, seated snugly under the bark.
- Seal airtight with paraffilm (stretchy, self-sealing, won’t girdle) — wrap up over the graft so no air dries it out.
- Add a small piece of colored electrical tape for visibility and to hold it solid against birds landing — but remove the electrical tape in a couple of weeks so it doesn’t girdle (paraffilm can stay).
- A good bark graft heals within about a week and starts growing.
T-bud (great for pears)
A single bud is inserted under a T-shaped cut in the bark of the stock; as long as cambium touches cambium, it takes. Ryan has T-budded varieties like Sweet Advent onto existing pear stock, producing fast, tall growth (a T-budded pear can reach ~15′ in two years). Chip buds and bark grafts work too — use whichever you’re comfortable with.
Using seedlings + grafting together
- Persimmon seedlings: plant in groups, then bark-graft any males over to a known female once sex is revealed — an inexpensive way to build a female-heavy planting.
- Wild/seedling stock on your property can be topworked to Blue Hill varieties, instantly upgrading unknown trees to proven ones with known drop times.
Rootstock we sell for grafting
- Antonovka and Malus Dolgo — vigorous standard apple rootstocks.
- Pear rootstock — standard seedling pear root.
- Persimmon rootstock — for grafting/topworking persimmons.
(See the Rootstock Guide for why standard roots are best for wildlife.)
Key takeaways
- Graft within a species, cambium to cambium, sealed airtight with paraffilm.
- Spring for apples/pears (at bud push); persimmons late spring–by ~July 1 so growth hardens off.
- Bark graft and T-bud are the easy, reliable methods; leave nurse branches on fresh grafts.
- Buy Blue Hill rootstock to graft your own, or topwork existing seedlings to named varieties.